Frank Zappa was one of the harder of musical tastes to acquire. A determined contrarian, before his death in 1993 he recorded close on 80 albums of music that melded intricate progressive rock, ferocious avant jazz, demented time signatures and pun-heavy surrealist lyrical musings delivered with a supercilious sneer.

It must be even harder to love such a man if he has bestowed upon you the name Dweezil, but after early career spells as a heavy metal guitarist, an MTV VJ and a sitcom actor, Zappa's loyal son has dedicated his professional life to preserving his father's musical legacy. Hence this tour, in which his eight-piece band performs choice cuts from Zappa Sr's back catalogue.

The evening's centrepiece is a performance in full of Zappa's 1974 album Apostrophe ('), which spawned his sole hit single, Don't Eat the Yellow Snow. Synchronised audio/video technology allows Frank to join in with the jam as a giant screen above the stage plays ancient concert footage of him picking through the whimsical key changes of Cosmik Debris as his son's band noodle beneath him.

It's an original format, but one that unfortunately emphasises the personality vacuum on stage. Dweezil on guitar is a benign but unremarkable presence, and over-emoting vocalist Ben Thomas lacks the deadpan charisma Frank ladled over musical essays such as Montana, Stinkfoot and What's the Ugliest Part of Your Body?

It's a spasmodically engaging evening, but the fact remains that we are effectively watching a tribute band lent added credibility by a familial relationship. Frank Zappa was a one-off, and maybe it would be best to leave things that way.